Модули для поиска с помощью CMake

CMakeLists.txt

@@ -54,6 +54,9 @@ add_subdirectory(src/myx/core)
 add_subdirectory(src/myx/filesystem)
 add_subdirectory(src/myx/qt)
 
+# Цель, используемая только для установки заголовочных файлов без компиляции проекта
+add_custom_target(myxlib-install-headers COMMAND "${CMAKE_COMMAND}" -DCMAKE_INSTALL_COMPONENT=base-dev -P
+                                                 "${CMAKE_BINARY_DIR}/cmake_install.cmake")
 # Примеры
 if(MYXLIB_BUILD_EXAMPLES)
   add_subdirectory(examples/core)

cmake/FindMyxlib.cmake

@@ -1,17 +1,32 @@
-set(MYXLIB_PREFIX "" CACHE PATH "The path to the previx of an myxlib installation")
+if(NOT MYXLIB_PREFIX STREQUAL CMAKE_BINARY_DIR)
+  set(MYXLIB_PREFIX
+      ""
+      CACHE PATH "The path to the previx of an myxlib installation")
 
-find_path(MYXLIB_INCLUDE_DIRS NAMES myx/core/config.hpp PATHS ${MYXLIB_PREFIX}/include)
-find_library(MYXLIB_QT_LIBRARY NAMES myx-qt PATHS ${MYXLIB_PREFIX}/lib)
-find_library(MYXLIB_FILESYSTEM_LIBRARY NAMES myx-filesystem PATHS ${MYXLIB_PREFIX}/lib)
+  find_path(
+    MYXLIB_INCLUDE_DIRS
+    NAMES myx/core/config.hpp
+    PATHS ${MYXLIB_PREFIX}/include)
+  find_library(
+    MYXLIB_QT_LIBRARY
+    NAMES myx-qt
+    PATHS ${MYXLIB_PREFIX}/lib)
+  find_library(
+    MYXLIB_FILESYSTEM_LIBRARY
+    NAMES myx-filesystem
+    PATHS ${MYXLIB_PREFIX}/lib)
 
-if(MYXLIB_INCLUDE_DIRS AND MYXLIB_QT_LIBRARY AND MYXLIB_FILESYSTEM_LIBRARY)
-  get_filename_component(MYXLIB_LIBRARY_DIR ${MYXLIB_QT_LIBRARY} DIRECTORY CACHE)
+  if(MYXLIB_INCLUDE_DIRS
+     AND MYXLIB_QT_LIBRARY
+     AND MYXLIB_FILESYSTEM_LIBRARY)
+    get_filename_component(MYXLIB_LIBRARY_DIR ${MYXLIB_QT_LIBRARY} DIRECTORY
+                           CACHE)
     set(MYXLIB_FOUND TRUE)
   endif()
 
   if(MYXLIB_FOUND)
     if(NOT MYXLIB_FIND_QUIETLY)
-    MESSAGE(STATUS "Found myxlib")
+      message(STATUS "Found myxlib")
     endif()
     set(HAVE_MYXLIB 1)
   elseif(MYXLIB_FOUND)
@@ -19,3 +34,4 @@ elseif(MYXLIB_FOUND)
       message(FATAL_ERROR "Could not find myxlib")
     endif()
   endif()
+endif()

cmake/FindMyxlibThirdparty.cmake

@@ -1,14 +1,40 @@
-ExternalProject_Add(
+# Подключение внешних проектов
+include(ExternalProject)
+
+# cmake-format: off
+list(APPEND _ext_project_args
   myxlib
   SOURCE_DIR          ${CMAKE_SOURCE_DIR}/thirdparty/myxlib
   INSTALL_DIR         ${CMAKE_BINARY_DIR}
   DOWNLOAD_COMMAND    ""
-    CONFIGURE_COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" -DCMLIB_MAIN_DIR=${CMLIB_MAIN_DIR} ${CMLIB_EXT_PROJ_DEFAULT_ARGS} <SOURCE_DIR>
-    BUILD_COMMAND true
-  )
+  CONFIGURE_COMMAND   ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
+                         -DCMLIB_MAIN_DIR=${CMLIB_MAIN_DIR}
+                         ${CMLIB_EXT_PROJ_DEFAULT_ARGS}
+                      <SOURCE_DIR>)
 
-set(MYXLIB_PREFIX  ${CMAKE_BINARY_DIR} CACHE FILEPATH "" FORCE)
-set(MYXLIB_INCLUDE_DIRS ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_INCLUDEDIR} CACHE PATH "" FORCE)
-set(MYXLIB_LIBRARY_DIR ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR} CACHE PATH "" FORCE)
-set(MYXLIB_QT_LIBRARY  ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libmyx-qt.a CACHE FILEPATH "" FORCE)
-set(MYXLIB_FILESYSTEM_LIBRARY ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libmyx-filesystem.a CACHE FILEPATH "" FORCE)
+if(MyxlibThirdparty_FIND_COMPONENTS STREQUAL "headers")
+  list(APPEND _ext_project_args
+    BUILD_COMMAND     true
+    INSTALL_COMMAND   ${CMAKE_MAKE_PROGRAM} myxlib-install-headers)
+endif()
+ExternalProject_Add(${_ext_project_args})
+unset(_ext_project_args)
+
+set(MYXLIB_IS_EXTERNAL_PROJECT ON CACHE BOOL "" FORCE)
+# cmake-format: on
+
+set(MYXLIB_PREFIX
+    ${CMAKE_BINARY_DIR}
+    CACHE FILEPATH "" FORCE)
+set(MYXLIB_INCLUDE_DIRS
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_INCLUDEDIR}
+    CACHE PATH "" FORCE)
+set(MYXLIB_LIBRARY_DIR
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}
+    CACHE PATH "" FORCE)
+set(MYXLIB_QT_LIBRARY
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libmyx-qt.a
+    CACHE FILEPATH "" FORCE)
+set(MYXLIB_FILESYSTEM_LIBRARY
+    ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_LIBDIR}/libmyx-filesystem.a
+    CACHE FILEPATH "" FORCE)